Device for taking up and setting down floating bodies, particularly aircraft, on or from platforms such as ships or landing stages



Oct. 20, 1931. w K|wULL 1,828,251

DEVICE FDR TAKING UP AND SETTING DOWN FLOATING BODIES, PARTICULARLY AIRCRAFT, ON OR FROM PLATFORMS SUCH AS SHIPS OR LANDING STAGES Filed May 24, 1930 wa iemazf' flzz or'wy Patented Oct. 20, 1931 I UNITED STATES PATENT OFFICE WOLDEMAR KIWULL, OF RIGA, LATVIA I DEVICE FOR TAKING UP AND SETTING DOWN FLOATING BODIES, PARTICULARLY I AIRCRAFT, ON OR FROM PLATFORMS SUCH AS SHIPS OR LANDING STAGES Application filed May 24, 1930, Serial No. 455,423, and in Germany June 19, 1929.

The present invention relates to an imwater stationary, even when a sea is running. proved device for taking up and setting down Under the action of the flow of water along floating bodies, particularly aircraft, on or the sides of the ship, which flow is always from ships, landing stages and the like. The non-uniform, the web has the tendency to i. object of the invention is to provide an imoscillate to and fro perpendicularly to the proved platform or way. path of the ship. This so-called yawing is The following requirements have to be met prevented in thatfair leaders, controlling dein the practical application of the principle vices or the like are provided on the resistof a way supported on artificially accumuing body 6 or on the web 1 or between path l 1o lated or piled up water for taking up and setand resisting body. In a particularly suitb ting down aircraft by travelling ships if reable form, this resisting body is provided liableoperation is to be obtained when a sea with pockets 11, 12-disposed on the side poris running. tions Q'and 3 and on the resisting body. They 1. Static and dynamic stability of the way. equalize out any non-uniform flow of the Y -1 2. Automatic equalization of load. water so that the web follows precisely the 3. Relieving the constructional parts of the course of the ship. aircraft from strain while being conveyed For the stability of aircraft resting freely over the way. 1 on the lower part B of the path 1, it isneces- An arrangement which satisfies these re sary that the weight P of the aircraft C causes I f quirements is represented in the drawing in a displacement in the accumulated or piled up perspective. water of sufiiciently large surface to give a The wayjof platform consists of a central .meta-c'entric height which ensures the initial portion land two lateral portions 2 and 3. stability of the system. This action can be The lateral portions are at the lower end B produced by the formation of a water pocket positioned by inclined bars l and at the upper in that, for example, that part of the web end A they lie in the plane of the central porwhere the aircraft rests is made bellying, tion so that a parapet is formed. At the upbulging or bag-like (of sectional curve SS per end A the web is connected to the deck through the central plane). Due to the load of a ship or landing stage andit is tensioned P, the web is then depressed in such manner I 1 9, by means of aresistingbody 6 disposed at the that a displacement of the path occurs in the 3 lower end B in the stream from thepropeller. region where the accumulation or piling up The web covers the accumulated water 7 of 7 of water occurs. The surface enclosed withthe propeller stream 5. The resisting body 6 in the marginal line of the depression deterand consequently the accumulation 7 can be mines the static stability of the web together I :55 adjusted by means of braces 8 which lead to with the superposed aircraft. 35 the deck. The course of the ship is indicated The dynamic stability or the security with by the arrow 9. I large inclinations due to the sea or when the The'turbulent flow 5 from the propeller air craft lands to one side, is effected by produces behind-the resisting body 6 reinmeans of the parapet or railiQ, 3 which -is forced eddies which tend to tilt or twist the particularly suited to this purpose on account end B'of the path dragging in thewater, and of its large displacement. It would also be for the stability of the web it is necessary that possible to provide independent auxiliary this flow should be converted into a laminar bodies which dip into the water to achieve flow. This transformation can be effected the same purpose.

1.45 by the provision of'slits or apertures in the In order to balance the load on the web 3 resisting body, e.'g.=by means of a net; The when an aircraft lands and when it is ad- 'water from the propeller which is forced 'vanced towards P the central part of the .1 through the. net assumes, under the action of path is limited by cordage secured by sewing, the mesh of the net, a laminar flow 10 which the so-called roping 13, 14, which is tensioned holdsthe end B of the Web towing in the by means of rigid supports 15 inserted in- 100 s in the web. This makes it possible to ma 0 the non-rigid central path rigid by means of a closed marginal system of forces. If, for example, the weight of the aircraft acts on P in the centre web, then in addition to the longitudinal and transverse tensions, diagonaltensions indicated by arrows 16 arise which are taken up by the supports 15 in such manner that the system of forces (pyramid of forces) is closed and distributes the load as a rigid whole over the roping 13, 14 between the deck of the vessel and the resisting body 6 and prevents the web from bending or sag- The third requirement of completely releasing from strain the constructive parts of the aircraft (floats, struts, hull), while it is being forwarded over the path, is fulfilled by inserting separate-slide members between path and aircraft prior to the motion, for example, a cradle, a band conveyor or a slipper. A slipper i. e. a flat boot-like body consisting of frame, floor boards, and shell is particularly suitable for this purpose. The surfaceof the slipper is made from stretched nil-cloth. The hawsers are secured to the boot-like body of the slipper which takes up the tractionul force and the pressure of the path in such. manner that the constructive parts (fleets) of the aircraft elastically bedded in the sail-cloth surface of the slipper 'nmn'ain entirely free from strain. Thus a reliable hauling on board and setting down of aircraft is ensured.

'I claim:

1. A device for taking up and releasing floating bodies. particularly aircraft. onto and from ships and the. like, comprising a platform extending from the ship into the Water: and means on the end of the platform extending in the water to convert the turbulent flow of water from the propeller of the ship into a laminar flow.

2. A device for taking up and releasing floating bodies, particularly aircraft, onto and from ships and the like, comprising a platform extending from the ship into the water; and a resisting body in the form of a not on the end of the platform extending in the water to convert the turbulent flow of water from the propeller of the ship into a laminar flow.

3. A device for taking up and releasing floating bodies, particularly aircraft, onto and from ships and the like, comprising a platform extending from the ship into the water; a lateral rtion on each side of the platform in the rm of a parapet to act as guides for the aircraft; and a resisting body on/the end of the platform extendingin the water to convert the turbulent flow of water 51:11: the propeller of the ship into a laminar A. Adevice for taking up and releasing floating bodies, particularly aircraft, onto and from ships and the like, comprising a platform extending from the ship into the water; a lateral portion on each side of the platform in the form of a parapet to act as guides for the aircraft; and a resisting body on the end of the platform extendin in the water to convert the turbulent flow 0 water from the propeller of the ship into a laminar flow, said platform having a bulging portion therein at that part where the aircraft is adapted to rest.

5. A device for taking up and releasing floating bodies, particularly aircraft, onto and from ships and the like, comprising a platform extending from the ship into the water; a lateral portion on each side of the platform in the form of a parapet to act as guides for the aircraft; and a resisting body on the end of the platform extending in the water to convert the turbulent flow of water,

from the propeller of the ship into a laminar flow, each lateral portion having a lateral pocket at the end of the platform to prevent yawing.

6. A device for taking up and releasing floating bodies, particularly aircraft, onto and from ships and the like, comprising a platform extending from the ship into the water; a lateral portion on each side of the platform in the form of a parapet to act as guides for the aircraft; and a resisting body on the end of the platform extending in the water to convert the turbulent flow of water from the propeller of the shi into a laminar flow, said platform having a bulging portion therein at that part where the aircraft is adapted to rest and each lateral portion having a lateral pocket at the end of the platform to prevent yawing.

7. A device for taking up and releasing floating bodies, particularly aircraft, onto and from ships and the like, comprising a platform extending from the ship into the water; a lateral portion on each side of the platform in the form of a para t to act as guides for the aircraft; a resisting body on the end of the platform extending in the water to convert the turbulent flow of water from the propeller of the ship into a laminar flow; and a rope at each edge of the platform and its lateral portion to balance the load on the platform.

8. A device for taking up and releasing floating bodies, particularly aircraft, onto and from ships and the like, comprising a platform extending from the ship into the water; a lateral ortion on each side of the platform in the cm of a parapet to act as guides for the aircraft; a resisting body on the end of the platform extending water to convert the turbulent flow of water from the propeller of the ship into a laminar flow; a rope at each edge of the platform and its lateral portion to balance the load on the platform; and a plurality of spaced rigid inthe supports secured to the platform to tension the ropes.

9. A device for taking up and releasing floating bodies, particularly aircraft, onto and from ships and the like, comprising a platform extending from the ship into the Water; means on the end of the platform extending in the Water to convert the turbulent flow of Water from the propeller of the ship into a laminar flow; and a sliding member adapted to be provided on the platform on which the aircraft is adapted to be conveyed to ghereby form an elastic bed for the aircra t.

10. A device for taking up and releasing floating bodies, particularly aircraft, onto and from ships and the like, comprising a platform extending from the ship into the Water; and a resisting body in the form of a net adjustably mounted on the end of the platform extending in the Water to convert the turbulent flow of water from the propeller of the ship into a laminar flow.

In testimony whereof I afiix my signature.

\VOLDEMAR KIWULL. 

